21137553

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{193}}^1\times {\mathrm{283}}^1$

素因数の和:525

約数の個数: 24

約数和(自身を含む): 31514912

約数和(自身を除く): 10377359

約数列:

[1, 3, 9, 43, 129, 193, 283, 387, 579, 849, 1737, 2547, 8299, 12169, 24897, 36507, 54619, 74691, 109521, 163857, 491571, 2348617, 7045851, 21137553]

約数ペア:

[(1, 21137553), (3, 7045851), (9, 2348617), (43, 491571), (129, 163857), (193, 109521), (283, 74691), (387, 54619), (579, 36507), (849, 24897), (1737, 12169), (2547, 8299)]